Power supply control device

Details Power supply control device Power supply control device

1999-02-01

1999-11-30

Han, Y. J.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 41, H02M 112

Patent

active

059953896

ABSTRACT:
A power supply control device, by which a plurality of switching power supply circuits of different properties are operated under switching conditions respectively fitted therefor simultaneously with the prevention of an occurrence of what is called a low-frequency switching beat phenomenon, thereby achieving the miniaturization and the increasing of the efficiency of a power supply unit. To synchronize the timing of switching operations among control systems or units of the power supply control device, the control device of the multi-channel type or the control device having a master-slave function is used. Further, a frequency divider circuit or a frequency multiplier circuit is connected to a comparator of such a control device. Thereby, although synchronizing the timing among the switching operations, a plurality of pulse output signals of different frequencies are outputted from the control systems or the control units. Incidentally, a frequency divider circuit or a frequency multiplier circuit may be added to an oscillation circuit of the control device, instead of connecting the frequency divider circuit or the frequency multiplier circuit to the comparator.

REFERENCES:
patent: 3694718 (1972-09-01), Graf et al.
patent: 5218522 (1993-06-01), Phelps et al.
patent: 5515257 (1996-05-01), Ishii
patent: 5537305 (1996-07-01), Colotti

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